Re: referencing models before syncdb

Check if that is not something you're looking for:

https://docs.djangoproject.com/en/1.5/ref/signals/#post-syncdb

On Wednesday, December 25, 2013 7:18:45 PM UTC, vinaya...@iiitd.ac.in wrote:

I have an actions.py file which defines custom actions for the admin page for one of my models. It uses an intermediary page (like the default delete action) and hence has a corresponding form which is also declared in the same file.

For some reason, I had drop by database (development) and now when I try to run syncdb, it gives me the following error:

Traceback (most recent call last):

  File "/home/vinayak/pyCharm/helpers/pycharm/django_manage.py", line 23, in <module>

    run_module(manage_file, None, '__main__', True)

  File "/usr/lib/python2.7/runpy.py", line 176, in run_module

    fname, loader, pkg_name)

  File "/usr/lib/python2.7/runpy.py", line 82, in _run_module_code

    mod_name, mod_fname, mod_loader, pkg_name)

  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code

    exec code in run_globals

  File "/home/vinayak/zenatix/customuser/manage.py", line 10, in <module>

    execute_from_command_line(sys.argv)

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 399, in execute_from_command_line

    utility.execute()

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 392, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 242, in run_from_argv

    self.execute(*args, **options.__dict__)

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 284, in execute

    self.validate()

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 310, in validate

    num_errors = get_validation_errors(s, app)

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/validation.py", line 34, in get_validation_errors

    for (app_name, error) in get_app_errors().items():

  File "/usr/local/lib/python2.7/dist-packages/django/db/models/loading.py", line 196, in get_app_errors

    self._populate()

  File "/usr/local/lib/python2.7/dist-packages/django/db/models/loading.py", line 75, in _populate

    self.load_app(app_name, True)

  File "/usr/local/lib/python2.7/dist-packages/django/db/models/loading.py", line 99, in load_app

    models = import_module('%s.models' % app_name)

  File "/usr/local/lib/python2.7/dist-packages/django/utils/importlib.py", line 40, in import_module

    __import__(name)

  File "/usr/local/lib/python2.7/dist-packages/debug_toolbar/models.py", line 63, in <module>

    patch_root_urlconf()

  File "/usr/local/lib/python2.7/dist-packages/debug_toolbar/models.py", line 51, in patch_root_urlconf

    reverse('djdt:render_panel')

  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py", line 480, in reverse

    app_list = resolver.app_dict[ns]

  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py", line 310, in app_dict

    self._populate()

  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py", line 262, in _populate

    for pattern in reversed(self.url_patterns):

  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py", line 346, in url_patterns

    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)

  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py", line 341, in urlconf_module

    self._urlconf_module = import_module(self.urlconf_name)

  File "/usr/local/lib/python2.7/dist-packages/django/utils/importlib.py", line 40, in import_module

    __import__(name)

  File "/home/vinayak/zenatix/customuser/customuser/urls.py", line 6, in <module>

    admin.autodiscover()

  File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/__init__.py", line 29, in autodiscover

    import_module('%s.admin' % app)

  File "/usr/local/lib/python2.7/dist-packages/django/utils/importlib.py", line 40, in import_module

    __import__(name)

  File "/home/vinayak/zenatix/customuser/iiitd/admin.py", line 3, in <module>

    from actions import grant_read_permission

  File "/home/vinayak/zenatix/customuser/iiitd/actions.py", line 13, in <module>

    class SelectUserForm(forms.Form):

  File "/home/vinayak/zenatix/customuser/iiitd/actions.py", line 16, in SelectUserForm

    clientObj = ClientInfo.objects.all()[:1].get()

  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 301, in get

    num = len(clone)

  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 77, in __len__

    self._fetch_all()

  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 854, in _fetch_all

    self._result_cache = list(self.iterator())

  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 220, in iterator

    for row in compiler.results_iter():

  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 710, in results_iter

    for rows in self.execute_sql(MULTI):

  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 781, in execute_sql

    cursor.execute(sql, params)

  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 69, in execute

    return super(CursorDebugWrapper, self).execute(sql, params)

  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute

    return self.cursor.execute(sql, params)

  File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", line 99, in __exit__

    six.reraise(dj_exc_type, dj_exc_value, traceback)

  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute

    return self.cursor.execute(sql, params)

django.db.utils.ProgrammingError: relation "iiitd_clientinfo" does not exist

LINE 1: ...ientinfo"."id", "iiitd_clientinfo"."corp_id" FROM "iiitd_cli...

iiitd is the name of one of my apps. The reason this is happening is because actions.py imports the iiitd_clientinfo model - but that doesn't exist yet, obviously. Currently, I make it work by excluding/commenting out my actions.py file. Surely, there has to be a work around?

I have tried the following:

1. south migration before syncdb - same error.
2. sorted out the INSTALLED_APPS order to ensure that they are in a topological order - same error
3. Used this in my actions.py:

try:

        clientObj = ClientInfo.objects.all()[:1].get()

except ClientInfo.DoesNotExist:

        clientObj = None

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